Coral reefs are considered as one of the most diverse ecosystems on the planet, home to 70% of marine biodiversity, due to the economic, recreational and tourism are the main source of goods and services to coastal populations. In recent decades anthrapogenic overexploitation has reduced both the diversity and coral cover, these changes are perceived local/y and global/y. The study was conducted at Isla Fuerte, Colombian Caribbean, where a characterization of the state of conservation considering the structure in terms of wealth, coverage, diversity and similarity of coral formations in four patch reefs (Los Pargos, Los mangos, El Ingles and Cantos Medio) transect technique using linear intercept point, bearing in mind the substrates of live coral, dead, diseased, sand, rack, algae, sponges and octocorals. In the four sampling stations were 22 species of scleractinian corals, notable for its high dominance Diploria strigosa, Acropora cervicornis, Porites astreoides, Diploria clivosa, Porites Porites, Montastrea cavernosa and Agaricia tenuifolia. We calculated a 54.22% decline of coral for the whole area. The state of health in terms of diseases is positive because coral cover was 1.05% sick and dead coral cover of 2.1%, indicating that in terms of health is partial/y healthy reef.